The first three terms of a geometric sequence are 27, -9 and 3. What is the value of the common ratio, r?

Step-by-step explanation:

Now sum of infinite series is  

a

1

−

r

and if first three term are removed, fourth term becomes the first term i.e. first term becomes  

a

r

3

and

sum of infinite series becomes  

a

r

3

1

−

r

As  

a

1

−

r

=

27

×

a

r

3

1

−

r

27

r

3

=

1

or  

r

3

=

1

27

and  

r

=

1

3

and hence

Common ratio is  

1

3

i don't have the answer rn but go to math papa. it shows the steps and the answer. hope this : )

step-by-step explanation:

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation: